Medium
icinga2 — security advisory
An issue was discovered in Icinga 2.x through 2.8.1. The daemon creates an icinga2.pid file after dropping privileges to a non-root account, which might allow local users to kill arbitrary processes by leveraging access to this non-root account for icinga2.pid modification before a root script executes a "kill `cat /pathname/icinga2.pid`" command, as demonstrated by icinga2.init.d.cmake.
- Products
- icinga2
- Affected versions
- 2.10.5-1build1, 2.11.2-1, 2.11.2-1ubuntu1, 2.11.2-1ubuntu2, 2.11.2-1ubuntu3, 2.12.3-1, 2.13.1-1, 2.13.2-1, 2.13.2-1build1, 2.13.2-1build2, 2.13.8-1, 2.14.1-1, 2.14.2-1, 2.14.2-1build1, 2.14.2-1build2, 2.14.5-1, 2.14.6-1, 2.15.0-1, 2.15.1-1, 2.16.1-1, 2.16.3-1, 2.16.4-1build1, 2.16.5-1, 2.3.11-1, 2.3.8-1build1, 2.4.0-1, 2.4.1-1, 2.4.1-2, 2.4.1-2ubuntu1, 2.7.0-1, 2.8.1-0ubuntu2
- Fixed versions
- Not specified
- CVEs
- CVE-2018-6536
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 00:29 UTC · Revision 1
Source evidence
An issue was discovered in Icinga 2.x through 2.8.1. The daemon creates an icinga2.pid file after dropping privileges to a non-root account, which might allow local users to kill arbitrary processes by leveraging access to this non-root account for icinga2.pid modification before a root script executes a "kill `cat /pathname/icinga2.pid`" command, as demonstrated by icinga2.init.d.cmake.
osv:UBUNTU-CVE-2018-6536
icinga2
Fixed versions: Not specified
icinga2
Fixed versions: Not specified
icinga2
Fixed versions: Not specified
icinga2
Fixed versions: Not specified
icinga2
Fixed versions: Not specified
icinga2
Fixed versions: Not specified
icinga2
Fixed versions: Not specified
icinga2
Fixed versions: Not specified
Complete source record
{
"id": "5289784c23ac86636c20169245df39e15d84c330f80bb150469c2459a1bf035e",
"url": "https://osv.dev/vulnerability/UBUNTU-CVE-2018-6536",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "UBUNTU-CVE-2018-6536",
"summary": "An issue was discovered in Icinga 2.x through 2.8.1. The daemon creates an icinga2.pid file after dropping privileges to a non-root account, which might allow local users to kill arbitrary processes by leveraging access to this non-root account for icinga2.pid modification before a root script executes a \"kill `cat /pathname/icinga2.pid`\" command, as demonstrated by icinga2.init.d.cmake.",
"evidence": "osv:UBUNTU-CVE-2018-6536",
"products": [
{
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"value": "icinga2",
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{
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"evidence": "/affected/0/versions"
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{
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{
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{
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{
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{
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{
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{
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{
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{
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{
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{
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"evidence": "/affected/5/versions"
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{
"value": "2.14.6-1",
"evidence": "/affected/5/versions"
},
{
"value": "2.15.0-1",
"evidence": "/affected/5/versions"
}
]
},
{
"name": {
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"evidence": "/affected/6/package/name"
},
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"affected_versions": [
{
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{
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"evidence": "/affected/6/versions"
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{
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"evidence": "/affected/6/versions"
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{
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{
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"evidence": "/affected/7/versions"
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],
"severity": "medium",
"structured": {
"id": "UBUNTU-CVE-2018-6536",
"aliases": [
"UBUNTU-CVE-2018-6536"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"
},
{
"type": "Ubuntu",
"score": "medium"
}
],
"affected": [
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},
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],
"database_specific": {
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},
"ecosystem_specific": {
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"ecosystem": "Ubuntu:26.04:LTS"
},
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},
"ecosystem_specific": {
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{
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{
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"binary_version": "2.15.1-1"
},
{
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},
{
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]
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}
],
"modified": "2026-10-17T12:55:28.074623791Z",
"provider": "osv",
"upstream": [
"CVE-2018-6536"
],
"references": [
"https://ubuntu.com/security/CVE-2018-6536",
"https://github.com/Icinga/icinga2/issues/5991",
"https://www.cve.org/CVERecord?id=CVE-2018-6536"
]
},
"related_cves": [
{
"value": "CVE-2018-6536",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 353791,
"published_at": "2018-02-02T09:29:00+00:00"
}